Upright tree skirt



FIG. 1 is a front view of an upright tree skirt showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof.

The broken lines shown in the drawings represent portions of the tree skirt that form no part of the claimed design. 

CLAIM The ornamental design for an upright tree skirt, as shown and described. 